<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
<form action="">
    <input type="text" value="" id="book_name">
</form>
</body>
<script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js"></script>
<script>
    $("#book_name").one("click", function() {
        $("#book_name").val("你好");
    });
</script>
</html>